class Sum{
  int n;
  float f() {
     float sum=0;
	for(int i=1;i<=n;i++)
	  sum=sum+i;
   return sum;
  }
}
class Average extends Sum{
  int n;
  float f(){
    float c;
    super.n=n;
     c=super.f();
    return c/n;
  }
    float g(){
       float c;
      c=super.f();
      return c/2;
   }
}
public class e5_7{
  public static void main(String args[]){
    Average aver = new Average();
   aver.n=100;
   float resultTwo = aver.g();

   float resultOne = aver.f();
   System.out.println("resultOne="+resultOne);
   System.out.println("resultTwo="+resultTwo);
 }
}
